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dmitriy555 [2]
3 years ago
6

ABC ~ QRS find the missing side length

Mathematics
1 answer:
never [62]3 years ago
5 0
The missing length is M = 15
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Aleena expands 2xx+3-5(x-2) as 2x2+3-5x-10. Has she expanded it correctly? Please identify the mistakes and write the correct wa
Nimfa-mama [501]

The given expression is :

2xx+3-5(x-2)

We know that, x{\cdot}x=x^2

=2x^2+3-5(x-2)\\\\=2x^2+3+(-5)(x)+(-5)(-2)\\\\=2x^2+3-5x+10

Aleena expands 2xx+3-5(x-2) as 2x²+3-5x-10. She is mistaken because the sign before 10 should be +10 instead of -10. Hence, the correct expanded form is 2x²+3-5x+10. Hence, this is the required solution.

5 0
3 years ago
{(1,0.5)(2,0.25)(3,0.125)(4,0.0625)} Which kind of model best describes the data set?
Kazeer [188]

Answer:

  exponential: y = 2^(-x)

Step-by-step explanation:

The y-differences are not constant, and the x-y products are not constant. For each increase in x, y is divided by 2, so this is a geometric sequence that can be described by an exponential model. The common factor is 1/2.

A simple way to write the model for this is ...

  y = 2^(-x)

5 0
4 years ago
Using factor theorem factorise each of the following
yuradex [85]

Answer:

(x + 1)(x - 1) (x- 2)(x - 5)

Step-by-step explanation:

<u>Solving in steps:</u>

  • x^4 - 7x^3 + 9x² + 7 x – 10=
  • (x^4 - 1 )- (7x^3 - 7x) + (9x^2 - 9) =
  • (x^2 + 1)(x^2 - 1) - 7x(x^2 - 1) + 9(x^2 - 1) =
  • (x^2-1)(x^2 + 1 - 7x + 9) =
  • (x + 1)(x - 1)(x^2 - 7x + 10) =
  • (x + 1)(x - 1)((x^2 - 2x) - (5x - 10)) =
  • (x + 1)(x - 1) (x- 2)(x - 5)
8 0
3 years ago
Write 265000 in standard form
Verdich [7]

Answer:

Step-by-step explanation:

The answer is 2.65 x 10^5.

Hope it helped you.

Plz mark me brainliest.

7 0
3 years ago
Alexander spends $125 from his paper route each month but he spent $20 each month and personal expenses to pay for a school trip
Georgia [21]
I think the answer is 6 months and then 1/4 of the other months.
8 0
3 years ago
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